Year: 2003
Type: article
Abstract: In spatial dimensions $d\ensuremath{\ge}2$, Kondo lattice models of conduction and local moment electrons can exhibit a fractionalized, nonmagnetic state (${\mathrm{F}\mathrm{L}}^{*}$) with a Fermi surface of sharp electronlike quasiparticles, enclosing a volume quantized by $({\ensuremath{\rho}}_{a}\ensuremath{-}1)(\mathrm{m}\mathrm{o}\mathrm{d}\text{ }2)$, with ${\ensuremath{\rho}}_{a}$ the mean number of all electrons per unit cell of the ground state. Such states have fractionalized excitations linked to the deconfined phase of a gauge theory. Confinement leads to a conventional Fermi liquid state, with a Fermi volume quantized by ${\ensuremath{\rho}}_{a}(\mathrm{m}\mathrm{o}\mathrm{d}\text{ }2)$, and an intermediate superconducting state for the ${Z}_{2}$ gauge case. The ${\mathrm{F}\mathrm{L}}^{*}$ state permits a second order metamagnetic transition in an applied magnetic field.
Source: Physical Review Letters
Authors: T. Senthil, Subir Sachdev, Matthias Vojta
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2080737272